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Cosmofy: Indian Regional Navigational Satellite System

Cosmofy: Indian Regional Navigational Satellite System: The Indian Regional Navigation Satellite System , or IRNSS , is a autonomous regional satellite navigation system developed by Indian Sp...

Indian Regional Navigational Satellite System

The Indian Regional Navigation Satellite System, or IRNSS, is a autonomous regional satellite navigation system developed by Indian Space Research Organisation which would be under total control of Inidan government.GPS software is relatively universal in the modern world but it is not guaranteed that you have a sure access to the network during a crisis situation, For example, there has been conversation as to whether the Russian GLONASS system will power the positioning data that India uses in the future, so to become independent in navigation system INDIA is ready to launch his own GPS system.

DEVELOPMENT :

The first satellite of the proposed constellation, developed at a cost of 1,600 crore is expected to be launched during 2012-2013 while the full constellation is planned to be realized around 2014.A goal of complete Indian control has been stated, with the space segment, ground segment and user receivers all being built in India. It is unclear if recent agreements with the Russian government to restore their GLONASS system will supersede the IRNSS project or feed additional technical support to enable its completion.

TECHNOLOGY USED :

IRNSS signals will consist of a Special Positioning Service and a Precision Service. Both will be carried on L5 (1176.45 MHz) and S band (2492.08 MHz). The SPS signal will be modulated by a 1 MHz BPSK signal. The navigation signals themselves would be transmitted in the S-band frequency (2–4 GHz) and broadcast through a phased array antenna to maintain required coverage and signal strength. The satellites would weigh approximately 1,330 kg and their solar panels generate 1,400 watts.The System is intended to provide an absolute position accuracy of better than 20 meters throughout India and within a region extending approximately 2,000 km around it.

The ground segment of IRNSS constellation would consist of a Master Control Center, ground stations to track and estimate the satellites' orbits and ensure the integrity of the network and additional ground stations to monitor the health of the satellites with the capability of issuing radio commands.


The satellites would also have a large footprint considering that they would have a geostationary orbit. A lower number of satellites would be necessary in order to provide full coverage of the region. These features should provide all weather coverage with strong signal strength. 

TIME FRAME :

Reports came in April 2010 that India plans to start launching satellites by the end of 2011, at a rate of one satellite every six months. This will make the IRNSS optimally functional by 2014.India also launched 3 new satellites into space to supplement this.

Indian Regional Navigational Satellite System (IRNSS-1) will be the first of the total seven satellites of the IRNSS constellation. It will have a lift off mass of 1380 kg and operate a navigation payload and a C-band ranging transponder and employ an optimised I-1K bus structure with a power handling capability of 1600W and is designed for a nominal mission life of 7 years.IRNSS-1 will be launched on-board PSLV-C22 during the second half of 2012 while the full constellation is planned to be realised by 2014.